only way i think it could be done is bumper off then get a piece of mdf wrapped in cling film. Place bumper on it and cut out shape of splitter the make a fibre glass mould of this then fill sand prime paint etc. Though that could be just stupid lol

or as you say remove the splitter then make a bottom bit for the bumper.

Just because the fashion for micra's is the euro low and wide look doesnt mean that someone with a big loud bodykit should get slated imo. (I personally like the euro look) but each to their own ey guys!?
I think there should be an unspoken rule that you dont say negative things about others cars unless they ask for your opinion.
Its just not very nice basicly. Alot of work has gone into that car and effort should be respected.
''If you aint got nuffin' nice to say...''

Sorry to see the damage waz, will take some repairing to get that back to rights!

***StaGGeRed***

I like Big Jap Kits! but i personally don't think it suits micras.
you should be able to get some fibreglass from halfords etc. and fix it, either that or trim the splitter away so your left with just the bumper.

i have an idea mate if you dont want that splitter, cut it completely off and get a laguna or polo splitter, and then retro fit it and i think it would give a good base to the hks bit as it would be left plain right?